Method of selectively depositing metal on a ceramic substrate wi

Details Method of selectively depositing metal on a ceramic substrate wi Method of selectively depositing metal on a ceramic substrate wi

1979-02-28

1980-06-03

Lawrence, Evan K.

Coating processes

Nonuniform coating

Applying superposed diverse coatings or coating a coated base

427 96, 427 98, 427 99, 427264, B05D 512, B05D 132

Patent

active

042062543

ABSTRACT:
A liftoff process for selectively depositing additional metal layers on an existing metallurgy pattern supported on a dielectric substrate which includes the steps of (1) depositing a melt material on the dielectric substrate which material, after melting, has the characteristic of wetting the substrate surface, but not the existing metallurgy pattern, (2) heating the melt material to convert it to a liquid wherein the material is distributed to cover the dielectric substrate surface, but not the metallurgy pattern, (3) cooling the liquid material to solidify it, (4) depositing a blanket layer of metal over the solidified material and the metallurgy pattern, and (5) dissolving the solidified material in a suitable solvent thereby removing the material and the overlying metal layer portions.

REFERENCES:
patent: 3617373 (1971-11-01), Mott
patent: 3948706 (1976-04-01), Schmeckenbecher
patent: 4008115 (1977-02-01), Fairbanks et al.

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